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Pass Guaranteed 2025 ISTQB High Hit-Rate CT-PT: Real ISTQB Certified Tester - Performance Testing Exam Dumps

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ISTQB CT-PT Exam Syllabus Topics:

Topic
Details

Topic 1

Types of Performance Testing: This section of the exam measures the skills of Software Test Analysts and covers various approaches such as load, stress, scalability, spike, endurance, concurrency, and capacity testing. It explains how each type evaluates system behavior under different conditions, helping testers and stakeholders understand how the system handles both expected and extreme usage scenarios.

Topic 2

Testing Types in Performance Testing: This section of the exam introduces the distinction between static and dynamic performance testing. It shows how reviews of requirements, architecture, and code can identify risks before coding is complete, and how runtime checks of resource utilization and response times reveal issues that only appear when the system is in operation.

Topic 3

The Concept of Load Generation: This section of the exam measures the skills of Software Test Analysts and discusses how representative loads are modeled and produced to simulate user or process behavior. It explores methods such as user interface inputs, crowdsourcing, API-based calls, or protocol capture and playback, emphasizing the need for repeatable loads that accurately reflect real-world conditions.

Topic 4

Common Failures in Performance Testing and Their Causes: This section of the exam measures the skills of Performance Engineers and outlines frequent failure modes, including slow responses at various load levels, degraded performance over time, and system crashes under peak conditions. It provides examples of underlying causes such as resource leaks, insufficient capacity, and poor handling of spikes or concurrency, illustrating why robust planning and monitoring are crucial for reliable performance.

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ISTQB Certified Tester - Performance Testing Sample Questions (Q27-Q32):

NEW QUESTION # 27
Which of the following is considered a characteristic of stress testing?

A. It focuses on the system's ability to handle transactions over a specific timeframe.
B. Considers the system's ability to recover from a sudden increase of loads within the system's limits.
C. It evaluates the system's ability to handle loads beyond its design limits.
D. It determines the maximum number of transactions a system can handle.

Answer: C

Explanation:
Stress testing is designed to evaluate how a system behaves under extreme conditions, often exceeding its design limitations. The goal is to identify bottlenecks, memory leaks, and failures that occur beyond normal operating conditions.
Option A is incorrect because it refers to resilience testing, which focuses on recovery rather than stress beyond limits.
Option B is incorrect as it describes load testing, which measures performance under expected loads.
Option C is incorrect since determining the maximum transactions is a feature of capacity testing, not stress testing.

NEW QUESTION # 28
Stakeholders were unhappy with previous performance test results, which indicated that the adjustments were not made fast enough and engine stall was probable. The developers have now made changes that they believe will significantly improve the performance of the adjustments.
What should you do to ensure the performance test objectives have been properly defined before you run the next set of performance tests?

A. Understand the delta between the results from previous performance tests and the results from the expected performance improvements.
B. Adjust stakeholder expectations to be more aligned with the reality of the previous test results.
C. Realign performance test objectives with business stakeholders to meet project milestone dates.
D. Realign performance test objectives with all stakeholders to meet time-to-market goals.

Answer: A

Explanation:
Before running the next set of performance tests, it is crucial to understand the differences (delta) between the previous test results and the expected improvements. This ensures that:
The changes made by developers are properly validated.
Performance objectives are aligned with measurable improvements.
Option B (Adjust stakeholder expectations) is incorrect, as performance testing should focus on real data rather than adjusting expectations.
Option C and D (Realign objectives for milestones or time-to-market goals) are incorrect because test objectives should focus on technical accuracy rather than schedule constraints.

NEW QUESTION # 29
You have run a load test. When examining the metrics, you see that the virtual users experienced many timeouts and excessive wait times. The system throughput metrics exceeded expected results, even during peak times.
Based on your analysis, what conclusion should you draw?

A. New test data is needed.
B. Processing speed is too slow.
C. Network infrastructure should be investigated.
D. Virtual users are exhibiting impatient behavior.

Answer: B

Explanation:
If timeouts and excessive wait times occur, but throughput is high, this suggests that the system is unable to process requests fast enough. This points to slow processing speed due to CPU bottlenecks, memory limitations, or inefficient database queries.
Option A (Network infrastructure investigation) would be relevant if throughput was low or variable.
Option C (Impatient virtual users) is irrelevant; virtual users follow scripted behaviors.
Option D (New test data) does not address the core issue.

NEW QUESTION # 30
You are heading the testing effort for a system that manages the air/fuel ratio of direct-injection fuel devices built specifically for high-altitude rescue helicopter engines. At altitude, the system must be able to perform in order to make enough air/fuel ratio adjustments per millisecond between fuel and both an on-board source and available ambient air in order to prevent an engine stall due to oxygen starvation. The system is following a sequential development lifecycle.
For this safety-critical software, when is the appropriate point in the lifecycle to identify and define the performance goals?

A. During the requirements phase when the business stakeholders have the opportunity to agree
B. After test readiness has been achieved, but before system testing starts
C. During the software design phase when the requirements are set and the design is being defined
D. At the very beginning of the project during the concept stage

Answer: A

Explanation:
For safety-critical software, performance goals must be identified as early as the requirements phase. This ensures that performance constraints are well understood and accounted for throughout development.
Option A (After test readiness but before system testing) is too late, as requirements should be defined before coding begins.
Option C (During the concept stage) is too early, as details may not be concrete.
Option D (During software design) is useful but should be preceded by a proper definition during the requirements phase.

NEW QUESTION # 31
Which of the following is a best practice to include in performance test scripts when verifying results?

A. Increase the number of scripts executed to provide greater coverage.
B. Add transaction timers to collect response times.
C. Hold the development team accountable for system performance.
D. Verify that correct information was added to the database.

Answer: D

NEW QUESTION # 32
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